noun, plural ratios. 1. the relation between two similar magnitudes with respect to the number of times the first contains the second: the ratio of 5 to 2, written 5:2 or 5/2. 2. proportional relation; rate: the ratio between acceptances and rejections. 3. Finance. the relative value of gold and silver in a bimetallic currency system. [oo l-ti-mah rah-tee-oh rey-goo m; English uhl-tuh-muh rey-shee-oh ree-guh m] /ˈʊl tɪˌmɑ ˈrɑ tiˌoʊ ˈreɪ gʊm; English ˈʌl tə mə ˈreɪ ʃiˌoʊ ˈri gəm/ Latin. 1. the final argument of kings (a resort to arms): motto engraved on the cannon of Louis XIV. /ˈreɪʃɪˌəʊ/noun (pl) -tios 1. a measure of the relative size of two classes expressible as a proportion: the ratio of boys to girls is 2 to 1 2. (maths) a quotient of two numbers or quantities See also proportion (sense 6) n.

ratio (rā’shō, rā’shē-ō’) A relationship between two quantities, normally expressed as the quotient of one divided by the other. For example, if a box contains six red marbles and four blue marbles, the ratio of red marbles to blue marbles is 6 to 4, also written 6:4. A ratio can also be expressed as a decimal or percentage. ratio [(ray-shee-oh, ray-shoh)]

An expression of the relative size of two numbers by showing one divided by the other.

[rey-shee-om-i-ter] /ˌreɪ ʃiˈɒm ɪ tər/ noun 1. (in three-color photography) a device for determining the exposure factors of the filters to be used.

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